1/* 2 * Copyright (C) 2008 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#include "config.h" 27#include "CSSCanvasValue.h" 28 29#include "ImageBuffer.h" 30#include "RenderObject.h" 31#include <wtf/text/StringBuilder.h> 32 33namespace WebCore { 34 35CSSCanvasValue::~CSSCanvasValue() 36{ 37 if (m_element) 38 m_element->removeObserver(&m_canvasObserver); 39} 40 41String CSSCanvasValue::customCssText() const 42{ 43 StringBuilder result; 44 result.appendLiteral("-webkit-canvas("); 45 result.append(m_name); 46 result.append(')'); 47 return result.toString(); 48} 49 50void CSSCanvasValue::canvasChanged(HTMLCanvasElement*, const FloatRect& changedRect) 51{ 52 IntRect imageChangeRect = enclosingIntRect(changedRect); 53 HashCountedSet<RenderObject*>::const_iterator end = clients().end(); 54 for (HashCountedSet<RenderObject*>::const_iterator curr = clients().begin(); curr != end; ++curr) 55 const_cast<RenderObject*>(curr->key)->imageChanged(static_cast<WrappedImagePtr>(this), &imageChangeRect); 56} 57 58void CSSCanvasValue::canvasResized(HTMLCanvasElement*) 59{ 60 HashCountedSet<RenderObject*>::const_iterator end = clients().end(); 61 for (HashCountedSet<RenderObject*>::const_iterator curr = clients().begin(); curr != end; ++curr) 62 const_cast<RenderObject*>(curr->key)->imageChanged(static_cast<WrappedImagePtr>(this)); 63} 64 65void CSSCanvasValue::canvasDestroyed(HTMLCanvasElement* element) 66{ 67 ASSERT_UNUSED(element, element == m_element); 68 m_element = 0; 69} 70 71IntSize CSSCanvasValue::fixedSize(const RenderObject* renderer) 72{ 73 if (HTMLCanvasElement* elt = element(renderer->document())) 74 return IntSize(elt->width(), elt->height()); 75 return IntSize(); 76} 77 78HTMLCanvasElement* CSSCanvasValue::element(Document* document) 79{ 80 if (!m_element) { 81 m_element = document->getCSSCanvasElement(m_name); 82 if (!m_element) 83 return 0; 84 m_element->addObserver(&m_canvasObserver); 85 } 86 return m_element; 87} 88 89PassRefPtr<Image> CSSCanvasValue::image(RenderObject* renderer, const IntSize& /*size*/) 90{ 91 ASSERT(clients().contains(renderer)); 92 HTMLCanvasElement* elt = element(renderer->document()); 93 if (!elt || !elt->buffer()) 94 return 0; 95 return elt->copiedImage(); 96} 97 98bool CSSCanvasValue::equals(const CSSCanvasValue& other) const 99{ 100 return m_name == other.m_name; 101} 102 103} // namespace WebCore 104